package com.theo.config;

import com.theo.entity.UserInfo;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginHandlerIntercepter implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //登录成功之后，应该有用户的session
        UserInfo loginUser = (UserInfo) request.getSession().getAttribute("loginUser");
        if (loginUser == null) {//没有登录
            request.setAttribute("error_message", "没有权限，请先登录");
            request.getRequestDispatcher("/tologin").forward(request, response);
            return false;
        } else {
            return true;
        }
    }
}
